Suddenly my C1000 keeps suspending when it's on battery power, even though it says the battery is 100% charged. If I power it on, I'll see the screen for a few seconds, then it will go black. After doing this a couple of times, it stops responding to the power button completely until I plug it in.

Sometimes I can get it to stay on for a little while on battery power, but if I do, it will suspend itself within two minutes or so. Again, it says the battery is 100% charged the whole time.

Does this mean that there's something wrong with the battery, or is there something else that might be wrong. I've tried rebooting.